Let’s break down the difference between adjectives, nouns (sustantivos), and adverbs in Spanish, using simple explanations in English: 1. Nouns (Sustantivos): Definition: Nouns are words that name people, places, things, or ideas. Examples in Spanish: Person: Niño (boy), Mujer (woman) Place: Escuela (school), Parque (park) Thing: Libro (book), Mesa (table) Idea: Libertad (freedom), Amor (love) Usage: Nouns can be the subject or object in a sentence. Example: El perro está en el parque. (The dog is in the park.) 2. Adjectives (Adjetivos): Definition: Adjectives are words that describe or modify nouns. They provide more information about the noun, such as its characteristics or qualities. Examples in Spanish: Color: Rojo (red), Azul (blue) Size: Grande (big), Pequeño (small) Other qualities: Bonito (beautiful), Viejo (old) Usage: Adjectives in Spanish usually agree in gender (masculine/feminine) and number (singular/plural) with the noun they modify. Example: La casa grande (The big house), Los niños felices (The happy children). 3. Adverbs (Adverbios): Definition: Adverbs are words that modify verbs, adjectives, or even other adverbs. They describe how, when, where, or to what extent something happens. Examples in Spanish: How: Rápidamente (quickly), Bien (well) When: Ayer (yesterday), Siempre (always) Where: Aquí (here), Allí (there) To what extent: Muy (very), Demasiado (too much) Usage: Adverbs can be placed before or after the verb they modify or at the end of a sentence. Example: Corre rápidamente. (He/She runs quickly.) Summary: Nouns name things, people, or ideas (e.g., "perro" - dog). Adjectives describe or qualify nouns (e.g., "grande" - big). Adverbs describe how an action is done, or modify adjectives and other adverbs (e.g., "rápidamente" - quickly). Each plays a unique role in the sentence structure to add meaning and detail.